If your wardrobe is full of clothes you no longer wear, or your desk is brimming with unused stationery, then now's your chance to declutter and help those in need.

GrabExpress, the on-demand delivery service from Grab, has announced a nationwide campaign to “deliver happiness” to underprivileged children by inviting its users to donate stationery, toys, sports equipment, clothes (of any size), books, etc. Items will be collected free of charge and delivered via GrabExpress Bike to children at Bangkok's Baan Nokkamin Foundation as well as other non-profit organizations across six provinces.

To participate, package your donations in a box or bag no bigger than 30 x 40 x 30 centimeters in size, with a weight limit of 15 kilograms. Then, simply go to the Grab application, choose the “Delivery” tab, enter your pick up location and select the donation point for your province (see below). Then select GrabExpress (Bike) and type in the promotion code “HAPPY,” followed by the recipient details (see below) and click “Book.” The GrabExpress Bike will then come and pick up your parcel from your house for free.

To donate in Bangkok (Baan Nokkamin Foundation), select “Thanapoom Tower” as your delivery destination and fill in the telephone number 0638459361 in the “recipient details” section.

All donations are free of charge between now and Aug 26 from 10am-4pm.